Black Dragons are warriors. They are strong and capable in battles of force, but also ample magic users, capable of devastating opponents with their spells. Their bright eyes give them excellent night vision, which is why they generally hunt during the night.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

When Kione hatched, he thought so little of the purple hatchling who was curiously poking his eggshell. The hatchling, Citadark, was his best friend, just a playmate to spend his hatchling years with. When Cita refused to let a mint egg be abandoned, Kione was the first to support him, even though he remained unaware of Cita's motivations. Only when he was older did he realise that Citadark saved his life when he didn't have enough strength to hatch, and the fun tricks he did were the early signs of Citadark's talents, being a Guardian of Nature. Kione adored his friend, idolizing him, and as he saw the stress of his destiny pile up on his friend's shoulders, he supported him unblinkingly throughout. Kione sees Cita as his big brother, and would blindly follow him through a hurricane, such is his trust. He has dedicated his life to helping and encouraging his friend, acting as his bodyguard at all times, and Kione is one of the few people that Cita trusts.